Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, China.
Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, USA.
Environ Sci Pollut Res Int. 2019 Dec;26(36):36857-36868. doi: 10.1007/s11356-019-06701-x. Epub 2019 Nov 19.
Gaseous formaldehyde removal efficiency and physiological characteristics of leaves were investigated through a dynamic fumigation system. Three different species of potted Chlorophytum Comosum, (Green Chlorophytum Comosum for its green leaves), CC (Combined the leaves of Chlorophytum Comosum with leaves half green and half white) and PC (Purple Chlorophytum Comosum for its purple leaves), were exposed to formaldehyde for 7 days. The results showed formaldehyde removal efficiencies in the daytime were 71.07% ± 0.23, 84.66% ± 0.19, and 46.73% ± 0.15 at 1 ppm for GC, CC, and GC plants, respectively, and were 36.21% ± 0.24, 62.15% ± 0.19, and 34.97% ± 0.11 at night. This might be due to higher plant physiological activities (e.g., photosynthesis, respiration, and transpiration) during the daytime than at night. Ten physiological indicators of leaves were chosen to evaluate the 7-day fumigation process, which were chlorophyll, free protein, relative conductivity, malondialdehyde (MDA), hydrogen peroxide (HO), hydroxyl radical, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and total antioxidant capacity (T-AOC). Eight of these indicators increased, while chlorophyll decreased by 22.16%, 6.95%, and 25.32%, and CAT decreased by 18.9%, 17.8%, and 25.30% for GC, CC, and PC respectively. Among all the increasing physiological indicators, relative conductivity and MDA showed the greatest increase by 279.32% and 155.56% for PC. A 15-day recovery study was also conducted using MDA and T-AOC as indicators. The results showed that all the tested plants could be tolerant up to the 8 ppm of formaldehyde concentration for 7 days under dynamic fumigation and needed 10-15 days for self-recovery.
通过动态熏气系统研究了气态甲醛去除效率和叶片的生理特性。将三种不同品种的盆栽吊兰（因其绿叶而被称为绿吊兰）、CC（将吊兰的绿叶与半绿半白的叶子相结合）和 PC（因其紫色叶子而被称为紫吊兰）暴露在甲醛中 7 天。结果表明，在 1ppm 时，GC、CC 和 PC 植物在白天的甲醛去除效率分别为 71.07%±0.23、84.66%±0.19 和 46.73%±0.15，在夜间则分别为 36.21%±0.24、62.15%±0.19 和 34.97%±0.11。这可能是由于白天植物的生理活动（如光合作用、呼吸作用和蒸腾作用）比夜间更高。选择了 10 个叶片生理指标来评估 7 天的熏气过程，这些指标包括叶绿素、游离蛋白、相对电导率、丙二醛（MDA）、过氧化氢（HO）、羟基自由基、超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）和总抗氧化能力（T-AOC）。其中 8 个指标增加，而叶绿素减少了 22.16%、6.95%和 25.32%，CAT 减少了 18.9%、17.8%和 25.30%，分别为 GC、CC 和 PC。在所有增加的生理指标中，相对电导率和 MDA 的增加幅度最大，分别为 279.32%和 155.56%，PC 增加幅度最大。还进行了 15 天的恢复研究，以 MDA 和 T-AOC 为指标。结果表明，在动态熏气条件下，所有测试植物在 7 天内均可耐受高达 8ppm 的甲醛浓度，需要 10-15 天进行自我恢复。
